Answers
Answer:
A. Metal
Explanation:
Hope this helps! :)
If this wasn't what you were looking for please don't hesitate to comment again! Have a nice day/night! :)
Answer:
Metal
Explanation:
they deleted my answer so I am putting it back sorry
Related Questions
If you increase the number of hours that you practice, you can score more goals in soccer.
a. Hypothesis?
b. How could you set up this experiment?
Answers
Answer:
A.Hypothesis
Explanation:
Answer:
Yes
Explanation:
Hypothesis: If i increase the number of hours i practice, then i will score more goals in soccer.
Set up. I would have two people who don't play soccer. One will be practicing for one hours every day, and the other will be practicing three hours every day. Based on my hypothesis, the person that is training three hours every day will score more goals than the person training one hour a day.
Suppose you made 40 atoms of Highlinium and it has a
half life of 2 seconds. How many Highlinium atoms would you expect to be
left after 6 seconds?
Answers
Answer:
After 6sec 5 atoms will be left.
Explanation:
Given data:
Total atoms of Highlinium = 40
Half life = 2 sec
Atoms left after 6sec = ?
Solution:
First of all we will calculate the number of half lives passes during 6sec.
Number of half lives = Time elapsed/ half life
Number of half lives = 6 sec / 2sec
Number of half lives = 3
Now we will calculate the number of atoms left
At time zero = 40 atoms
At 1st half life = 40 atoms/2 = 20 atoms
At 2nd half life = 20 atoms/2 = 10 atoms
At 3rd half life = 10 atoms / 2 = 5 atoms
Thus, after 6sec 5 atoms will be left.
How many liquids are found on the periodic table?
1
Answers
There are six liquids found on the periodic table.
1. Bromine
2. Mercury
3. Caesium
4. Gallium
5. Rubidium
6. Francium
Water molecules stick together by a force called?
Answers
Answer:
Cohesion
Explanation:
Depending on how attracted molecules of the same substance are to one another, the substance will be more or less cohesive. Hydrogen bonds cause water to be exceptionally attracted to each other. Therefore, water is very cohesive.
Calculate the volume of a cube having sides 3.0 cm in length
Answers
Answer: 27
Explanation:
3*3*3
you take l*w*h (3*3*3)
If you double the lenght of a wire, how does the resistance of the wire change?
and
If you make a wire twice as thick, how does the resistance of the wire change?
Answers
Answer:
If the length of a wire is doubled the resistance is shortened if it is thicker is is more durable due to the electrons having more room to spread out and flow through the wire
I hope this will help you
what’s the empirical and molecular formula for a compound with 20.2% sodium, 37.6% sulfur, 42.2%oxygen and a molar mass of 682.8g/mol?
Answers
Answer:
Empirical formula: Na3S4O9
Molecular formula: Na6S8O18
Explanation:
1) To find the empirical formula, which is the simplest whole number ratio of each element that makes up this unknown compound, we first divide the portion of each element by it's respective atomic mass.
Na= 23g/mol, S= 32g/mol, O=16g/mol
Na = 20.2/23 = 0.878mol
S = 37.6/32 = 1.175mol
O = 42.2/16 = 2.638mol
Next, we divide each number of moles by the smallest value (0.878mol)
Na = 0.878/0.878 = 1
S = 1.175/0.878 = 1.34
O = 2.638/0.878 = 3.004
Next, we multiply each decimal fraction by 3 to make it whole no:
Na = 3
S= 4.02 ~ 4
O= 9.012 ~ 9
The simplest ratio between Na, S and O is 3:4:9 hence, the empirical formula is Na3S4O9
2) To get the molecular formula, we use the molecular weight of each element in the empirical ratio, and the overall molar mass of the compound i.e.
Molar mass of compound= 682.8g/mol
molecular weight of Na3S9O4 = (3 x 23g/mol) + (4 x 32 g/mol) + (9 x 16 g/mol)
= 69 + 128 + 144
= 341 g/mol
Hence, (Na3S4O9)n = 682.8g/mol
= (341)n = 682.8
n = 682.8/341
n = 2.002
n~ 2
Hence, molecular formula = (Na3S4O9)2
= Na6S8O18
The empirical and molecular formula are Na₃S₄O₉ and Na₆S₈O₁₈
respectively.
The empirical formula can be gotten by dividing each element by it's
respective atomic mass.
Na= 23g/mol, S= 32g/mol, O=16g/mol
Na = 20.2/23 = 0.878mol
S = 37.6/32 = 1.175mol
O = 42.2/16 = 2.638mol
Then divide each number of moles by the smallest value which in this case is 0.878mol.
Na = 0.878/0.878 = 1
S = 1.175/0.878 = 1.34
O = 2.638/0.878 = 3.004
Next, we multiply each decimal fraction by 3 to make it whole no:
Na = 3
S= 4.02 ~ 4
O= 9.012 ~ 9
The simplest ratio between Na, S and O is 3:4:9 hence, the empirical formula is Na₃S₄O₉
The molecular formula is calculated by multiplying the molecular weight of each element with empirical ratio to get overall molar mass of the compound
Molar mass of compound is given as 682.8g/mol
Molecular weight of Na₃S₉O₄ = (3 x 23g/mol) + (4 x 32 g/mol) + (9 x 16 g/mol)
= 69 + 128 + 144
= 341 g/mol
Hence, (Na3S4O9)n = 682.8g/mol
= (341)n = 682.8
n = 682.8/341
n = 2.002
n~ 2
Hence, molecular formula = (Na₃S₄O₉)²
= Na₆S₈O₁₈
Table:Question 1
All of these elements are metals except
Select one:
helium.
gold.
sodium.
aluminum
Answers
Answer:
Helium is nonmetal
Explanation:
At immense pressures (such as what exists in the center of gas giant planets like Jupiter and Saturn), both Helium and Hydrogen enter a metallic state, where both will conduct electricity. Helium turns into a liquid metal similar to Mercury. So, helium can be a metal.
4) Ramon is playing soccer. The ball comes straight at him, and he kicks it to a player on his right. His kick is an example of A) a pull that stops the ball. B) a force that changes the roll of the ball. C) a pull that creates the motion of the ball. D) a force that changes the direction of the ball. Eliminate
Answers
Answer:
it's D my guy
Explanation:
Answer:
I took a usatestprep with this same question so i know the answer is D
Hopefully you find this helpful. :)
On a cool morning, Uyen’s breath can form a cloud when she breathes out. Which changes of state are most responsible for Uyen seeing her breath in this way?
melting
condensation
deposition
sublimation
Answers
Calculate the mass (g) of 1.5 moles of Sulfur.
Answers
Answer:
48 g S
Explanation:
Step 1: Define
Molar Mass of Sulfur (S) - 32.07 g/mol
Step 2: Use Dimensional Analysis
[tex]1.5 \hspace{3} mol \hspace{3} S(\frac{32.07 \hspace{3} g \hspace{3} S}{1 \hspace{3} mol \hspace{3} S} )[/tex] = 48.105 g S
Step 3: Simplify
We have 2 sig figs.
48.105 g S ≈ 48 g S
1. Matter can be measured in many ways for specific purposes. Which measurement depends on the force of gravity it is not reliable measurement?
A. Mass
B. Weight
C. Volume
D. Temperature
2. A bar of gold occupies a volume of 17.0cm3 and has a mass of 34.5g. What is the density of that bar of gold?
A. 2.1 ml/g
B. 2.0 g/cm3
C. 0.49 g/cm3
D. 0.51 ml/g
3. What volume of copper will weigh exactly 240g and have a density of 10.5g/cm3
A. 0.04g/cm3
B.18.2g
C.22.8g/cm3
D.21.4 cm3
Answers
Answer:
1. B- weight
2. B- 2.0g/cm3
3. C- 22.8g/cm3
Explanation:
I need help so please help me
Answers
Answer:b
Explanation:
I honestly don’t know if this I right but that would be my guess
How does one recognize a periodic trend on the periodic table?
O A. Find elements in random positions of the periodic table.
B. Look for predictable changes and patterns.
O C. Look for all elements with 2 electrons in
any orbital.
D. Compare an element's properties to the properties of a noble gas.
Answers
Answer:
B. Look for predictable changes and patterns.Explanation:
Answer:
B
Explanation:
an atom has 43 protons 55 neutrons and 44 electrons. what is the charge of the atom's nucleus?
Answers
What does the symbol Pt mean in a chemical equation in chemistry?
Answers
Explanation:
It is mean Platinum .
hope to helped.
As the lauric acid was melting, heat was being added to it but the temperature did not rise. Where did the heat energy go?
Answers
During the phase change, when solid melts into liquid, its temperature remains constant as the heat energy is stored as potential energy. Likewise, as heat is added to a liquid, its temperature increases as the molecules, once again, move faster.
Melting is the physical process where solid gets converted to the liquid phase. When lauric acid was melting heat was added to it, but the temperature did not rise as it was used in breaking the intermolecular forces.
What is melting?Melting is categorized as a physical change that is reversible. It involves the transition phase of the matter. Here the solids get converted to liquids.
It is a phase change where the heat is added to the object to undergo physical alterations. The heat energy is stored as potential energy in melting.
This energy and heat are used to break the intermolecular forces present in the matter so that the phase of the matter can be converted from solids to liquids.
Therefore, the heat energy in melting is used to break the forces and bonds.
Learn more about melting here:
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1. Naturally occurring europium (Eu) consists of two isotopes was a mass of 151 and 153. Europium- 151 has an abundance of 48.03% and Europium-153 has an abundance of 51.97%. What is the atomic mass of europium?
Answers
Work:
151(0.4803) = 72.52 amu
153(0.5197) = 79.5 amu
72.5 + 79.5 = 152 amu
Snow that weathers buildings in a city is an example of: A mechanical weathering B acid precipitation carbonation D oxidation
Answers
Answer:
A
Explanation:
because its weathering them down.
A 9.0 g of a mysterious substance was heated from 23.0°C to 85.0°C using 127 J of heat. To identify the substance we need to know the specific heat capacity of it. What is the mysterious substance’s specific heat capacity?
Answers
Answer:
0.228 J/g°C
Explanation:
The specific heat capacity, denoted by c, can be calculated using the formula:
Q = m × c × ∆T
Where; Q = amount of heat
m = mass
c = specific heat capacity
∆T = change in temperature
In this question, m = 9.0g, Q = 127J, T1 = 23°C, T2 = 85°C
Using, Q = m × c × ∆T
127 = 9 × c × (85-23)
127 = 9 × c × 62
127 = 558c
c = 127/558
c = 0.2275
c = 0.228 J/g°C
Guys please what is the answer of 6y+-2
Answers
Answer: 6y-2
Explanation: If it is not equal to something, then it will just be plain old
6y-2. Unless you have to graph it...
so, divide 6y and -2 by 6.
you get y+-1/3
Which group is a good conductor of heat and electricity?
Answers
Answer:
Typically metals.
Explanation:
Which electrons are the valence electrons of the atom?
Helpppppppp
Answers
Explanation:
electrons in the highest energy orbitals which are able to contribute to Bonding are valence electrons,....... please mark me brainiest
What does the measurement 45 N represent in the photograph?
A. The direction of the force
O B. The net force
O C. The magnitude (size) of a force
D. An action force with no opposite
SUBMIT
Answers
The measurement 45 N represent the magnitude (size) of a force in photograph. Therefore, option C is correct.
What is the magnitude of a force?The magnitude of the force is the number that represents the force's strength. Assume the force is 10 N in the direction of the east. The direction is indicated by 'towards east,' and the magnitude is indicated by '10'. Magnitude is thus the 'value' or 'amount' of any physical quantity.
The magnitude of force is expressed in mass times length times time squared. The most common metric unit is the newton (N), which is defined as one kilogram times one meter over one second squared.
Thus, option C is correct.
To learn more about the magnitude of a force, follow the link;
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WILL GIVE BRAINLIEST!!
In the vinegar and Salt solution, is it possible there was some other compound that formed on the egg shell instead of the food coloring? Based on what you know about the charge on the egg shell and the ions in the solution, what might have reacted to form a compound on the shell instead of the food coloring?
Answers
Answer: Most food dyes are acid dyes, so called because they only work in acidic conditions. The vinegar—a solution of 5 percent acetic acid in water—is there to bring the pH low enough that the dye will actually bind.
Explanation: Brainlest please
What is the circulatory system?
a. The system that helps you breathe.
b. The system that helps you move.
c. The system that transports blood.
d. The system that sends electrical signals.
Answers
Answer:
c
Explanation:
Answer:
C
Explanation:
The respiratory is breathing
The muscular system is the movement
Please make the following calculation and round your
answer to the correct number of significant figures:
103 x 3.327
Answers
Answer:
343
Explanation:
In the same condition, what happens to the net force acting on the rope?
Answers
Answer:
Explained below
Explanation:
Newton's law of inertia states that An object at rest will remain continue at rest or if in motion, will continue in motion unless in both cases it is acted upon by a net external force.
Now, If two forces on the rope are equal and opposite forces, then the net force on the rope will be zero and it will not move. Thus,balance force is present in the rope and the rope will remain at rest since the net force is zero or it will continue in motion if already in motion without stopping since net force is zero
However, if the forces are acting in the same direction, it will result in an unbalanced force which means that the net force will be equal to the sum of the two forces and this will result in a stronger force than even the 2 individual forces and consequently it will cause the rope at rest to move, or if the rope is in motion, it will cause it to stop.
Which of the following types of energy does an object store in the bonds of atoms and molecules? (5
points)
Chemical energy
Gravitational energy
Kinetis energy
Sound energy
Answers
Answer:
Chemical Energy
Explanation:
Answer:
yes
Explanation:
Which statement best summarizes the importance of Ernest Rutherford's gold foil experiment?
o It proved that all of John Dalton's postulates were true,
O It verified J. J. Thomson's work on the atomic structure.
It showed that an electron circles a nucleus in a fixed-energy orbit
O It showed that a nucleus occupies a small part of the whole atom.
Answers
Answer:
d
Explanation: